So what did we learn this week? Santa and Muppet cameos definitely work to an advertiser's advantage.

AT&T and Google topped the list of the 5 best TV commercials of the week by a landslide. AT&T's ad showed Siri helping Santa with his 3.7 billion appointments Christmas Eve, and Google's featured the Muppets lip syncing "Under Pressure" while "hanging out" on Google+. (If only the Swedish Chef would join my hangouts!)

The following slideshow features the top five best new ads of last week — December 17 - 23 — along with Ace Metrix CEO Peter Daboll's insights on what made them work.

Apple: "Santa Uses Siri" - Ace Score: 652

"Apple ads do well in general because their products are cool," Daboll said. "But a score of 652 is exceptional." Most successful ads score in the 500's.

Google: "The Muppets Hang Out" - Ace Score: 644

Google has a tradition of making very effective commercials. "They've turned into great consumer marketers," Daboll said. Instead of making snappy 30 second commercials to flood the airwaves, Google creates minute long ads that tell a full story and only run once or twice.

And come on, the Muppets singing Queen? How was this not going to work?

Travelers: "Thinking Of Others" - Ace: 569

Although Travelers Insurance doesn't champion a specific charity, their commercial highlights the spirit of giving... with PUPPIES. "We've done studies that show it's better to use a dog than a celebrity," Daboll said.

Mountain Dew: "My Mountain: Danny Davis" - Ace Score: 568

"Nike and Mountain Dew could be marketing the same product," Daboll said of the snowboarding themed commercials. "That's why they scored so similarly."